Journal
JOURNAL OF FOURIER ANALYSIS AND APPLICATIONS
Volume 28, Issue 3, Pages -Publisher
SPRINGER BIRKHAUSER
DOI: 10.1007/s00041-022-09938-2
Keywords
Fourier analysis; Vilenkin system; Vilenkin group; Vilenkin-Fourier series; Almost everywhere convergence; Carleson-Hunt theorem; Kolmogorov theorem
Categories
Funding
- Shota Rustaveli National Science Foundation [FR-19-676]
- Hungarian National Research, Development and Innovation Office -NKFIH [KH130426]
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In this paper, we discuss and prove an analogy of the Carleson-Hunt theorem with respect to Vilenkin systems. We use the theory of martingales to provide a new and shorter proof of the almost everywhere convergence of Vilenkin-Fourier series for p > 1, in case the Vilenkin system is bounded. Moreover, we also prove the sharpness by stating an analogy of the Kolmogorov theorem for p = 1 and construct a function in L-1(G(m)) such that the partial sums with respect to Vilenkin systems diverge everywhere.
In this paper we discuss and prove an analogy of the Carleson-Hunt theorem with respect to Vilenkin systems. In particular, we use the theory of martingales and give a new and shorter proof of the almost everywhere convergence of Vilenkin-Fourier series of f is an element of L-p(G(m)) for p > 1 in case the Vilenkin system is bounded. Moreover, we also prove sharpness by stating an analogy of the Kolmogorov theorem for p = 1 and construct a function f is an element of L-1(G(m)) such that the partial sums with respect to Vilenkin systems diverge everywhere.
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